The gap between the valence and conduction bands of a certain semiconductor is 0.85 eV. When this semiconductor is used to form a light emitting diode, the wavelength of the light emitted:
A. is in a range above 1.5 × 10−6 m
B. is in a range below 1.5 × 10−6 m
C. is always 1.5 × 10−6 m
D. is in a range centered on 1.5 × 10−6 m
E. has nothing to do with the gap
